* {
    margin: 0;
    padding: 0;
}


.clearfix:before,.clearfix:after {
    content: "";
    display: table;
}

.clearfix:after {
    clear: both;
}
.clearfix {
    *zoom:1;
}

body{
    background-color: #fcf4f4;
    height: 3000px;
}
.w {
    width: 1200px;
    margin: 0 auto;
}

.header {
    height: 42px;
    /* background-color: pink; */
    margin: 30px auto;
}

.logo {
    width: 198px;
    height: 42px;
    /* background-color: blueviolet; */
    float: left;
}
li {
     list-style: none;
}
.nav{
    float: left;
    margin-left: 60px;
}
.nav ul li{
    float: left;
    margin: 0 15px;
}
a{
    text-decoration: none;
}
.nav ul li a{
    /* a是行内元素，没有宽度，要先转换成块级元素宽度才会起作用：display：block */
    display: block;
    height: 42px;
    padding: 0 10px;
    line-height: 42px;
    font-size: 18px;
    color: #050505;
}
.nav ul li a:hover{
    border-bottom: 2px solid dodgerblue;
    color: dodgerblue;
}
.search{
    width: 412px;
    height: 42px;
    float: left;
    /* background-color: aqua; */
    margin-left: 70px;
}
.search input{
    width:345px;
    height:40px;
    border: 1px solid aqua;
    border-right: 0;
    color: #bfbfbf;
    font-size: 14px;
    padding-left: 15px;
    float: left;
}
.search button{
    width: 50px;
    height: 42px;
    /* background-color: blue; */
    border: 0;
    float: left;
    background: url(../案例图片/btn.png);
}
.user{
    float: right;
    margin-right: 30px;
    font-size: 14px;
    color: #666;
    line-height: 42px;
}
.banner{
    height: 421px;
    background-color: #1c036c;
}
.banner .w{
    height: 421px;
    background: url(../案例图片/banner2.png);
}
.subnav{
    width: 190px;
    height: 421px;
    background: rgba(0,0,0,0.3);
    float: left;
}
.subnav ul li a{
    font-size: 14px;
    color: #fff;
}
.subnav ul li{
    height: 46px;
    line-height: 45px;
    padding: 0px 20px;
}
.subnav ul li a span{
    float: right;
}
.subnav ul li a:hover{
    color: dodgerblue;
}
.subnav ul li a span:hover{
    color: dodgerblue;
}
.course{
    width: 230px;
    height: 300px;
    background-color: #fff;
    float: right;
    margin-top: 50px;
}
.course h2{
    height: 48px;
    background-color: rgb(62, 198, 198);
    text-align: center;
    color: #fff;
    line-height: 48px;
    font-size: 18px;
}
.bd{
  padding: 0 20px;
}
.bd ul li h4{
    font-size: 16px;
    color: #4e4e4e;
}
.bd ul li p{
    font-size: 12px;
    color: #a5a5a5;
}
.bd ul li{
    border-bottom: 1px solid #a5a5a5;
    padding: 15px 0;
}
.bd .more{
    height: 38px;
    border: 1px solid #00a4ff;
    display: block;
    text-align: center;
    line-height: 38px;
    color: #00a4ff;
    font-size: 16px;
    font-weight: 700;
    margin-top: 5px;
}
.goods{
    height: 60px;
    background-color: #fff;
    margin-top: 10px;
    box-shadow: 0 2px 3px 3px rgba(0,0,0,0.1);
    line-height: 60px;
}
.goods ul{
    float: left;
    margin-left: 30px;
}
.goods h3{
    float: left;
    margin-left: 30px;
    font-size: 16px;
    color: #00a4ff;
}
.mod{
    float: right;
    margin-right: 30px;
    font-size: 14px;
    color: #00a4ff;
}
.goods ul li{
    float: left;
}
.goods ul li a{
    padding: 0 30px;
    font-size: 16px;
    color: #050505;
    border-left: 1px solid #a5a5a5;
}
.box{
    margin-top: 30px
}
.box-hd{
    height: 45px;
}
.box-hd h3{
    float: left;
    font-size: 20px;
    color: #4e4e4e;
}
.box-hd a{
    float: right;
    font-size: 12px;
    color: #a5a5a5;
    margin-top: 10px;
    margin-right: 30px;
}
.box-bd ul li{
    position: relative;
    width: 228px;
    height: 270px;
    background-color: #fff;
    float: left;
    margin-right: 15px;
    margin-bottom: 15px;
}
.box-bd ul li em{
    position: absolute;
    right: -4px;
    top: 2px;
}
.box-bd ul{
    width: 1225px;
}
.box-bd ul li>img{
    width: 100%;
}
.box-bd ul li h4{
    margin: 20px 20px 20px 25px;
    font-size: 14px;
    color: #050505;
    font-weight: 400;
}
.box-bd ul li .info{
    margin: 0 20px 0 25px;
    font-size: 12px;
    color: #999;
}
.box-bd ul li .info span{
    color: #ff7c2d;
}
.footer{
    height: 415px;
}
.footer .w{
    padding-top:35px
}
.copyright{
    float: left;
}
.links{
    float: right;
}
.copyright p{
    font-size: 12px;
    color: #666;
    margin: 20px 0 15px 0;
}
.copyright .app{
    display: block;
    width: 118px;
    height: 33px;
    border: 1px solid #00a4ff;
    text-align: center;
    line-height: 33px;
    color: #00a4ff;
    font-weight: 700;
    font-size: 16px;
}
.links dl{
    float: left;
    margin-left: 100px;
}
.links dl dt{
    font-size: 16px;
    color: #333;
    margin-bottom: 5px;
}
.links dl dd a{
    color: #333;
    font-size: 12px;
}